Insert, Delete and Update in generic list in C#

Introduction
This Code for Insert Update and Delete in Generic List in ASP.Net with C#

Using This Code
Insert Update and Delete in List

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace GenericList {     public partial class frmContact : Form     {         List contacts;         public frmContact()         {             InitializeComponent();         }         # region Insert Operation         private void btnInsert_Click(object sender, EventArgs e)         {             Customer cnt = new Customer();             cnt.Name = txtName.Text.Trim();             cnt.Mobile = txtMobile.Text.Trim();             contacts.Add(cnt);             CurrencyManager cm = (CurrencyManager)this.BindingContext[contacts];             cm.Refresh();             dgcontacts.DataSource = contacts;         }         # endregion         #region Update Operation         private void btnUpdate_Click(object sender, EventArgs e)         {             List select = contacts.FindAll(new Predicate(HasName));             if (select.Count > 0) // record found             {                 foreach (Customer cnt in select)                 {                     cnt.Name = txtName.Text.Trim();                     cnt.Mobile = txtMobile.Text.Trim();                 }                 CurrencyManager cm = (CurrencyManager)this.BindingContext[contacts];                 cm.Refresh();                 dgcontacts.DataSource = contacts;             }             else             {                 MessageBox.Show("No records found");             }         }         # endregion         //This function will check for the person name         bool HasName(Customer c)         {             return (c.Name == txtName.Text);         }         # region Delete Operation         private void btnDelete_Click(object sender, EventArgs e)         {             List select = contacts.FindAll(new Predicate(HasName));             if (select.Count > 0) // record found             {                 foreach (Customer cnt in select)                 {                     contacts.Remove(cnt);                 }                 CurrencyManager cm = (CurrencyManager)this.BindingContext[contacts];                 cm.Refresh();                 dgcontacts.DataSource = contacts;             }             else             {                 MessageBox.Show("No records found");             }         }         # endregion         private void frmContact_Load(object sender, EventArgs e)         {             contacts = new List();         }     }     //Customer Class     public class Customer     {         private string _Name;         private string _Mobile;         public string Name         {             get { return _Name; }             set { _Name = value; }         }         public string Mobile         {             get { return _Mobile; }             set { _Mobile = value; }         }     } }